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question

igor.rmarinho_185445 avatar image
igor.rmarinho_185445 asked ·

How can I find the root cause of a "monitored DSE down" in the OpsCenter UI?

Hi all,

I'm having an issue... All 3 nodes have the same config, but one node the monitored dse is down. Is there a file or something that I can check to find the root cause of it?

I checked all agent files, opscenter files etc...

Any thoughts on it?

Thank you.

Screen Shot 2020-04-15 at 5.20.59 PM.png

opscenteragent
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dmngaya avatar image
dmngaya answered ·

Hi,

Maybe you did that , if not can you verify errors from opscenterd.log for opscenter, agent.log for datastax agent and also system.log and debug.log to see if there are some errors.


Best,

Dieudonne.

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Thanks dmgaya,

I was missing the agent.log, found the problem.

Thanks!

0 Likes 0 · ·
Erick Ramirez avatar image
Erick Ramirez answered ·

@igor.rmarinho_185445 "Monitored DSE" in the OpsCenter agents status view refers to the DSE node that is being monitored. With the UI itself, you can click on the red exclamation mark to get additional information on it. Here's a sample extract of the additional info you can get:

    "last_seen": 1587010226,
    "version": "6.7.5",
    "condition": "NODE_DOWN",
    "install_status": {
      "error-message": null,
      "state": null
    },
    "jmx": {
      "updated_at": 1587010226,
      "last_up": 1587009818,
      "status": "down"
    },
    "monitored_cassandra": {
      "updated_at": 1587010226,
      "last_up": 1587009818,
      "status": "down"
    },

In the example above, you can see that the agent has flagged it as NODE_DOWN and the monitored DSE/Cassandra instance also has a "down" status. You should then check the logs to determine why the node is unavailable.

For more information on using the OpsCenter web interface, see DataStax Agents Status View which contains links to troubleshooting steps. Cheers!

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